Director Seth Holt died from a heart attack before completing this film. It was finished by Hammer Studios head Michael Carreras.
In an interview, Valerie Leon once talked about her refusal to do nude scenes in this and other films upsetting Hammer producers: "I did three movies where everyone was naked except for me. I kept my clothes on, which was quite bizarre. I lost a lot of work by not disrobing completely. I think it was shyness. I built a wall around myself and became unapproachable- it was the only way I knew how to handle my lack of confidence." Hammer executives were dismayed with Leon. "I refused to show too much in any of the publicity shots that I did," she said. "I was a disaster on the Hammer 'glamour queen' front because I didn't bare all. I've always believed suggestion is more erotic than showing everything anyway."
The name of the character Tod Browning is an homage to the director of such horror films as Dracula (1931).
Valerie Leon was very upset at not being allowed time off from the filming, so that she could pay her final respects to Seth Holt at his funeral.